We have been supporting a lovely woman in New Zealand, whose beautiful white cat has mammary cancer. Both are doing well, and have great veterinary advice. The woman wants to see her beloved cat through to a natural death, if possible, and has been caring for her lovingly. (Cancer itself is not painful, although it can cause pain if it interferes with other organs, etc.; death itself isn't either, although conditions leading to death may be)
Another visitor wanted to tell us about the death of her dear cat. She had been expecting to have her euthanized at the end, but the end came quickly and easily for her. She was amazed and gratified at the love which passed between them during the short dying process, and at the peace and wonder of that time together.
Folks are able to contact any of us in the group between meetings...for advice or reassurance. (We do not give medical advice)
Our group has a facebook page, the Animal Natural Death Support Group, which you are invited to join. Lots to learn; lots to think about! When you join, you'll receive a link to each zoom meeting. See you there!